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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CAVEATS | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
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PMNSADD(1) General Commands Manual PMNSADD(1)
pmnsadd - add new names to the Performance Co-Pilot PMNS
$PCP_BINADM_DIR/pmnsadd [-?] [-n namespace] file
pmnsmerge(1) performs the same function as pmnsadd and is faster,
more robust and more flexible. It is therefore recommended that
pmnsmerge(1) be used instead.
pmnsadd adds subtree(s) of new names into a Performance Metrics
Name Space (PMNS), as used by the components of the Performance
Co-Pilot (PCP).
Normally pmnsadd operates on the default Performance Metrics Name
Space (PMNS), however if the -n option is specified an alternative
namespace is used from the file namespace.
The default PMNS is found in the file $PCP_VAR_DIR/pmns/root
unless the environment variable PMNS_DEFAULT is set, in which case
the value is assumed to be the pathname to the file containing the
default PMNS.
The new names are specified in the file, arguments and conform to
the syntax for PMNS specifications, see PMNS(5). There is one
PMNS subtree in each file, and the base PMNS pathname to the
inserted subtree is identified by the first group named in each
file, e.g. if the specifications begin
myagent.foo.stuff {
mumble 123:45:1
fumble 123:45:2
}
then the new names will be added into the PMNS at the non-leaf
position identified by myagent.foo.stuff, and following all other
names with the prefix myagent.foo.
The new names must be contained within a single subtree of the
namespace. If disjoint subtrees need to be added, these must be
packaged into separate files and pmnsadd used on each, one at a
time.
All of the files defining the PMNS must be located within the
directory that contains the root of the PMNS, this would typically
be $PCP_VAR_DIR/pmns for the default PMNS, and this would
typically imply running pmnsadd as root.
As a special case, if file contains a line that begins root { then
it is assumed to be a complete PMNS that needs to be merged, so
none of the subtree extraction and rewriting is performed and file
is handed directly to pmnsmerge(1).
Provided some initial integrity checks are satisfied, pmnsadd will
update the PMNS using pmnsmerge(1) - if this fails for any reason,
the original namespace remains unchanged.
The available command line options are:
-n pmnsfile
Load an alternative Performance Metrics Name Space (PMNS(5))
from the file pmnsfile.
-? Display usage message and exit.
Once the writing of the new namespace file has begun, the signals
SIGINT, SIGHUP and SIGTERM will be ignored to protect the
integrity of the new files.
$PCP_VAR_DIR/pmns/root
the default PMNS, when the environment variable PMNS_DEFAULT
is unset
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values for
these variables. The $PCP_CONF variable may be used to specify an
alternative configuration file, as described in pcp.conf(5).
pmnsdel(1), pmnsmerge(1), pcp.conf(5), pcp.env(5) and PMNS(5).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2025-08-11.
(At that time, the date of the most recent commit that was found
in the repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot PCP PMNSADD(1)
Pages that refer to this page: pmnscomp(1), pmnsdel(1), pmnsmerge(1), pmda(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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